Fun game! I would definitely play more levels of this. One gripe I have is that the precision platforming by one of the early checkpoints doesn't work very well. You have to squeeze through a one-tile gap with almost no speed, or you'll hit the spikes (or maybe I'm approaching it wrong). The hitbox for the spikes is also a bit harsh from the side; if you hit a solid wall and fall straight down with some spikes to the right of you, you collide with the spikes, even though you didn't really hit them. That's pretty minor though, since I would usually find spikes to touch anyway if I wanted to respawn.